After looking at one ton trucks with dually wheels, I prefer the one ton trucks with single rear wheels. What would I be giving up not getting the dually wheels?
When they don't need the water then why force them to drink. Just because some people are thirsty don't mean everyone is.
If a SRW is with-in it's axle and tire ratings then the two extra tires do little to improve. Been there and do it every time I tow my rig and yes have done it with DRW too.